Revista elektron

8-15

Authors: Leslie Cusato, Mariel Estevez, Guillermo Daniel Santiago, Martín Germán González

In this paper we present the study of three sensors, based on piezoelectric polymer thin films, for photoacoustic systems used in the characterization of liquids. Its performance was compared by carrying out measurements on well-known liquids. From the measured data, the sensitivity, noise level and quantification limit of each of the sensors were determined. The device with the best characteristics was used in the determination of the quantum efficiency of two dyes: Rhodamine 6G and Rhodamine B. The measured values agree very well with those reported by other authors.

23-28

Authors: Milton Eduardo Sosa, Eduardo Omar Sosa

Lighting, ventilation, and air conditioning environments at the Universidad Nacional de Misiones are variables manually controlled even today. It is a fact that devices remain connected even in the absence of students/teachers, with no control or capacity of implement some action on temperatures or artificial/natural lighting. It is necessary to start an intelligent automated control of equipment and appliances, to reduce substantially the energy cost and to contribute to cut down the greenhouse effect. The proposed solution is carried out by using non-expensive components and the existing physical infrastructure in the location. The system performs monitoring, control of lighting and air condition equipment, as well as the presence of people in the environments. The control unit allows driving and monitoring the built modules by an application developed for the purpose.

38-47

Authors: Mauricio Anderson Ricci

This work presents an Internet’s Topology study, based on its tomography. Our objective was on the gathering of data and their analysis, at both levels: routers and IP. To do that, we developed an Open Source tool called Magallanes, which uses PlaneLab platform for performing explorations trough nodes around the world.